Accurate analytical/numerical solution of the heat conduction equation. Issue 7 (26th August 2014)

• Record Type: Journal Article
• Authors: Campo, Antonio; J. Salazar, Abraham; J. Celentano, Diego; Raydan, Marcos
• Is Part Of: International journal of numerical methods for heat & fluid flow. Volume 24:Issue 7(2014)
• Page Start: 1519
• Page End: 1536
• Publication Date: 2014-08-26
• Subjects: Heat -- Transmission -- Mathematics -- Periodicals; Fluid dynamics -- Mathematics -- Periodicals; 536.2
• DOI: 10.1108/HFF-01-2013-0030
• Languages: English
• ISSNs: 0961-5539

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <sec> <title content-type="abstract-heading">Purpose</title> <p> – The purpose of this paper is to address a novel method for solving parabolic partial differential equations (PDEs) in general, wherein the heat conduction equation constitutes an important particular case. The new method, appropriately named the Improved Transversal Method of Lines (ITMOL), is inspired in the Transversal Method of Lines (TMOL), with strong insight from the method of separation of variables. </p> </sec> <sec> <title content-type="abstract-heading">Design/methodology/approach</title> <p> – The essence of ITMOL revolves around an exponential variation of the dependent variable in the parabolic PDE for the evaluation of the time derivative. As will be demonstrated later, this key step is responsible for improving the accuracy of ITMOL over its predecessor TMOL. Throughout the paper, the theoretical properties of ITMOL, such as consistency, stability, convergence and accuracy are analyzed in depth. In addition, ITMOL has proven to be unconditionally stable in the Fourier sense. </p> </sec> <sec> <title content-type="abstract-heading">Findings</title> <p> – In a case study, the 1-D heat conduction equation for a large plate with symmetric Dirichlet boundary conditions is transformed into a nonlinear ordinary differential equation by means of ITMOL. The numerical solution of the resulting differential equation is straightforward and brings forth a nearly zero truncation error over the entire time domain, which is practically nonexistent. </p> </sec> <sec> <title content-type="abstract-heading">Originality/value</title> <p> – Accurate levels of the analytical/numerical solution of the 1-D heat conduction equation by ITMOL are easily established in the entire time domain.</p> </sec> </abstract>